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On the class‐F power amplifier design
Author(s) -
Colantonio Paolo,
Giannini Franco,
Leuzzi Giorgio,
Limiti Ernesto
Publication year - 1999
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/(sici)1099-047x(199903)9:2<129::aid-mmce7>3.0.co;2-u
Subject(s) - amplifier , ideal (ethics) , nonlinear system , harmonic , class (philosophy) , power (physics) , electronic engineering , control theory (sociology) , rf power amplifier , computer science , topology (electrical circuits) , engineering , electrical engineering , physics , acoustics , philosophy , control (management) , cmos , epistemology , quantum mechanics , artificial intelligence
Power‐amplifier class‐F operation is investigated and revised, evidencing the fundamental importance of the harmonic‐generating mechanism and the limitations imposed by the device input and output nonlinearities on the ideal class‐F behavior. Closed‐form expressions are derived for the major design quantities, together with the optimum fundamental and third‐harmonic loading of the active device. A design procedure, making use of the derived expressions, is presented and the deviations from the ideal behavior are discussed. Sample designs, making use of a full nonlinear device model and commercial analysis software, are carried out to demonstrate the effectiveness of the analysis and the design procedure. It is shown, both analytically and using commercial nonlinear simulations, that blind application of commonly used, idealized class‐F harmonic terminations can cause unexpected detrimental results. ©1999 John Wiley & Sons, Inc. Int J RF and Microwave CAE 9: 129–149, 1999